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Finding the Fourth Proportional to 153,923.91, 212,412.91 and 85,941.92

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Solution

The fourth proportional to 153,923.91, 212,412.91 and 85,941.92 is: 118,598.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,923.91 : 212,412.91 = 85,941.92 : x
  2. Step 2: Convert to fraction form
    153,923.91/212,412.91 = 85,941.92/x
  3. Step 3: Cross multiply
    153,923.91x = 212,412.91 × 85,941.92
  4. Step 4: Simplify right side
    153,923.91x = 18,255,173,318.19
  5. Step 5: Solve for x
    x = 18,255,173,318.19/153,923.91
  6. Step 6: Final answer
    x = 118,598.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.